Pile cutter for looms



Dec. 17,- 1929. c. scHLEMPER PILE GUTTER FOR LOOMS Eiled Aug. 25, 1928 LM; /i

Patented Dec. 17, 1929 PATENT OFFICE CRL SCHLEMPER, OF OHLIGS, GERMANY PILE CUTTER FOR LOOMS Application led August 25, 1.928, Serial No. 302,049, and in Germany August 29, 1927.

This invention relates to a pile cutter for looms and of the kind wherein a knife blade is detachably fitted in a holder composed of two interconnected plate strips.' The object of the invention is t provide simple means whereby the blade can be securely fixed to the holder and yet allow of being placed in position without the risk of breaking the blade and without the use of tools, and the invention consists in forming the holder with a. groove wherein the blade is engaged at both ends by overhanging edges, .one of the strips being cut away opposite one end of the groove so as to form an open-ended slot through which, after the blade has been inserted into the opposite end of the groove, the end of the blade can be deflected while the blade is being forced completely into the groove.

Fig. l of the accompanying drawings represents a side View of the pile cutter according to one construction, Fig. 2, a section on line 3 3 of Fig. 1, Fig. 3, a section on line 4 4 of Fig. 1, Fig. 4, a side view of this cutter, Fig. 5, a view of the knife blade employed in this cutter,

Fig. 6, a section on the line 8 8 of Fig. 4, Fig. 7, a side view of the same, Fig. 8, a view of the knife blade employed in this cutter, and

Fig. 9, a section on the line 12 12 of Fig. 7.

- The pile cutter comprises a wedge-shaped knife blade c which is detachably fitted in a groove in a laminated holder composed of two plate strips a and b which are welded together. The strips are widened at one end to form a head, and the strip ais recessed at the inner side so as to form the groove whereinthe blade c is accommodated. The groove extends rearwards from the head of the holder and is adapted to receive the blade with the wide end thereof situated in the head and with the Cutting edge sloping downwards from the head in a projecting position. The recess in the strip a is undercut at the ends so as to form overhanging edges .e and z' adapted to engage, one over the narrow end d of the blade c and the other over a reduced longitudinal extension f at the wide end of the blade. The recess is made so as to follow the outlines of the blade, including the eX- tension f, and the blade will therefore be firmly secured to the holder.

In order to allow the blade to be detached from the holder and exchanged, the strip a is cut away opposite and above the extension f so as to f orm an open-ended slot. This slot coincides at one side with the edge z' and forms at the other side an upwardly projecting tongue z..

Forinserting the blade into the holder, the narrow end cl is first vplaced in position against the edge e at the rea-r end of the groove whereupon the entire blade is forced e5 into the groove, the extension f being for this purpose deflected through the gateway formed between the edge i and the tongue L. When the blade reaches the bottom of the-groove, the extension f snaps sideways into its recess whereupon the blade will be firmly secured to the holder.

The insertion may be leffected direct by hand. For the removal of the blade a nail or other simple tool may be used whereby the extension f is wrenched out of its recess. The tool is admitted through a notch g made in the strip a at the edge of the slot, as shown in Figs. 1 and 2.

The shape of the extension f may be varied. 30 In the construction of Figs. 1-3 it is rounded ofi' semi-circularly -at the free end.

In the constructionaof Figs; 4-6, the lower part c of the extension is right-angled and a right-angled notch Z1 is made at the g5 junction between the extension and the blade proper so as to form an interlocking neck, the recess in the strip a being formed with a corresponding projection l. This arrangement prevents the blade from being displaced 9o and it will therefore be firmly secured to the holder whether the pointed end l makes a snug fit with the edge e or not. In this construction the strip b is formed with an aperture m through which a nail or the like can be inserted for forcing the extension f out of the recess when the blade is to be removed. l

A further modification, is shown in Figs. 9-12 wherein the extension f is elongated and wedge-shaped, the free end being the widest.

As the wedge fits snugly in therecess made for it in the strip a, displacement of the blade is aga-in prevented irrespective of whether the end d bears firmly against the edge e or not. Arounded notch p is made in the extension which fits a corresponding projection o on the holder strip a. At the free end of the extension a notch 7' is made which is bridged by a straight edge on the holder strip a so as to admit a tool whereby the extension can,

having an enlarged head portion for the re-v ception of the Wide end of the blade, the ends ofthe groove being undercut so as to form overhanging edges adapted to engage over the ends of the blade and hold the latter in position, one of the holder strips being cut away opposite one end of the groove so as to form an open-ended slot through which the end of the blade can be deflected while it is being' forced into the groove.

2. A pile cutter for looms comprising a Wedge-shaped knife blade having at its free end a reduced longitudinal extension, and a laminated holder for said blade composed of two interconnected plate strips enlarged at one end to form a head, one of said strips being recessed at its inner side so as to form between the strips a groove in which the blade can be accommodated with its wide end situated in the end of the holder and withv in the blade extension is wedge-shaped, widest at its free end and formed with a notch at the junction with the blade, the strip recessv being shaped in conformity with the outlines ofthe extension and the notch.

' CARL SCHLEMPER.

its edge in an oblique projecting position, the

strip recess being undercut at the ends so as to form overhanging edges adapted to engage over the ends of the blade and keep the latter in position, the head of the recessed strip being cut away so as to exposed the blade extension and so as to form an openended slot through which, after the narrow end of the blade has been placed in position, the blade extension can be deflected and allow the wide end of the blade tobe forced into the groove.

3. A structure as claimed in claim 2 where- -in the strip recess is shaped in conformity `svith the outlines of the blade and its extension. v

4. A structure as claimed in claim 2 wherein the blade extension is form'ed with a neck and wherein the strip recess is shaped in conformity with the outlines of the extension '1ncluding the neck.

5. A structure as claimed in claim 2 wherein t-he blade extension is wedge-shaped and widest at its free end, the strip recess being shaped in conformity with the outlines of the extension.

6. A structure as claimed in claim 2 Where- 

